Rory leads crowded PGA by one through 54

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Thanks to a up-and-down for bridie from the sand at the last, Rory McIlroy takes a one-shot lead into the final round of the 96th PGA Championship as he seeks to win his fourth career major. Here's a look at a very crowded leaderboard heading into Sunday at Valhalla:

What it means: McIlroy is 18 holes away from winning back-to-back majors and back-to-back-to-back starts, following victories at the Open Championship and last week's WGC-Bridgestone Invitational. Just 1 under through his first 14 holes Saturday, McIlroy closed with three birdies in his final four holes for a third-round 67.

Round of the day: Goes to Wiesberger, who alongside Mickelson shot a bogey-free 6-under 65 to briefly lead and later tie McIlroy atop the leaderboard. Wiesberger, a 28-year-old Austrian, was a combined 42 over par in his 12 previous major rounds entering the PGA, but is 12 under through three days at Valhalla. Hunter Mahan matched Wiesberger's 65 Saturday but sits six back.

Best of the rest: How about everybody at the top of this leaderboard? Eight players are within four shots of McIlroy, who saw nearly every one of them challenge his lead throughout the afternoon, particularly during a chaotic back nine. Special consideration goes to the following list of four, currently in the top 5, who shot 67 Saturday: Mickelson, Fowler, Oosthuizen, Stenson.

Biggest disappointment: Poor Jim Furyk. The 44-year-old snakebit veteran was the only player still in the top 38 who didn't shoot par or better Saturday, with a 1-over 72.

Shot of the day: The PGA decided to have some fun and make the already-short par-4 fourth into a 292-yard free-for-all. Oosthuizen hit his tee shot to 3 feet for a tap-in eagle. We'll give it to him, although Day, playing in the final group with McIlroy, gets a tip of the cap for taking his shoes off, wading through a creek and making an all-world par from the mess way left of the second fairway.

Storylines heading into Sunday: Will McIlroy make media members' heads explode as they decide the word "era" just isn't going to cut it? Can the thoroughly unheralded Wiesberger emerge from a star-studded leaderboard? Is it finally time for Rickie Fowler, who's finished in the top five of every major this year, to break through? Can Mickelson fend off the young guns to win his sixth major and second PGA? Bottom line: It's going to be an entertaining Sunday in Kentucky.